pingcap/tidb

executor: avoid joiner to copying data when filter rows

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#12.030 aperta il 4 set 2019

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Descrizione

Feature Request

Is your feature request related to a problem? Please describe:

We can use the sel field in chunk.Chunk instead of copying data in baseJoiner.filter when filtering data in join executor

Describe the feature you'd like:

We can use the sel field in chunk.Chunk used in baseJoiner.filter

Describe alternatives you've considered:

Teachability, Documentation, Adoption, Migration Strategy:

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